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...wnward [[fold hinge]]s; [[synclinal]] axial surfaces occupy concave-upward fold hinges. ...ons on non-migrated or under-migrated sections do not accurately represent fold shape. However, axial surfaces can be inferred on these sections by mapping

...verted. The large, deep fault northwest of the [[Vandana]] area is a major hinge line, controlling deposition through time and a pivot point north across wh ...eloped. The rapid deepening to the south coincides with a faulted basement hinge zone that controls the younger regional tilting in the basin and may repres

...a /><ref name=Etnsn85b /> linked basin [[deformation]] and subsidence to [[fold]]-belt orogeny, where a migrating [[foreland basin]] (i.e., proximal trough ...present. The area is structurally complex, with high-amplitude detached [[fold]]s, repeated and overturned beds, and multiple thrust faults.